01553nas a2200205   4500008004100000245015400041210006900195260001200264300001200276490000700288520079100295653002301086653002001109653001801129653001701147653002501164100001801189700001401207856012601221       1999                        eng d00aPopulation age and sex structure of <i>Aphanius fasciatus </i>Nardo, 1827 (Pisces: Cyprinodontidae) in the Mesolongi and Etolikon Lagoons (W. Greece)0 aPopulation age and sex structure of iAphanius fasciatus iNardo 1  c1999///  a227-2350 v403 aThe population structure of Aphanius fasciatus in the Mesolongi and Etolikon lagoonal system was studied, using 5794 fish. Significant differences were observed in the number of individuals of each sex, the age and size composition and survival. The overall males to females sex ratio was 1:2.44, although there was seasonal variation. During the reproductive period the percentage of males in the population decreased significantly, while after reproduction and during recruitment they increased. The females in each age class were larger than the males (40.33 mm and 36.72 mean total length for females and males, respectively). The survival rate of females was greater than males (0.73 for females and 0.60 for males). The strategy of this species is to invest in female individuals.10aAphanius fasciatus10aCyprinodontidae10aGreek lagoons10alife history10aPopulation structure1 aLeonardos, I.1 aSinis, A.  uhttps://icgf.myspecies.info/content/population-age-and-sex-structure-aphanius-fasciatus-nardo-1827-pisces-cyprinodontidae